Brooklyn's neighborhoods are dynamic in ethnic composition. For example, the early to mid-20th century, Brownsville had a majority of Jewish residents; since the 1970s it has been majority African American. Midwood during the early 20th century was filled with ethnic Irish, then filled with Jewish residents for nearly 50 years, and is slowly becoming a Pakistani enclave. Brooklyn's most populous racial group, white, declined from 97.2% in 1930 to 46.9% by 1990.